SEALING PLATE FOR BATTERY

摘要

PROBLEM TO BE SOLVED: To provide a safety valve that breaks by the deformation of a case when the internal pressure of a battery is increased. SOLUTION: A sealing plate for sealing an opening part of the battery case is made of a plate-like material, the sealing plate has the safety valve, the safety valve has a lower surface comprising a thin flat part formed by seat-press working in the plate-like material, and the flat part is broken by tension in the surface direction of the plate-like material caused by the deformation of the case by the deformation of the case when the internal pressure of the battery is increased. COPYRIGHT: (C)2004,JPO